Your levy at work

April pest of the month: Xylella fastidiosa

Xylella fastidiosa is Australia’s number one national priority plant pest. It is a bacterial pathogen that can cause disease on many host plants, most notably Pierce’s disease on grapevine. It is known to infect hundreds of host plant species across nearly 100 families and is recognized as priority pests…

Kenya: Locust outbreak may be coming to an end

The Horn of Africa has been experiencing its worst locust crisis in more than 25 years. In Kenya, the swarms of insects are the worst they've been in 70 years. But things…

Scouting and treatment of gray mold in greenhouse crops

While March 2021 was one of the sunniest on record here in Michigan, cloudy and cool weather inevitably rolls in during April and May. Peak color in the greenhouse coincides with cloudy, damp weather that creates a favorable environment for the fungus Botrytis cinerea, which causes gray mold on many…

ICL launches plant health planner

To help growers plan ahead and optimise plant health on nurseries year-round, ICL has developed a ground-breaking new Plant Health Planner. “A digital web-based tool, it is designed to both simplify and optimise plant health programmes on UK nurseries,” explains ICL Technical Area Sales Manager, Sam…

Researchgate

Haze of glue determines preference of western flower thrips for yellow or blue traps

In a wind tunnel the team compared the color preference for western flower thrips to four types of color plates (clear, white, blue and yellow) applied with two types of glue (diffuse Stikem versus clear D41). Further the results for blue and yellow preference were validated in two greenhouses. In the…

Massachusetts: western flower thrips spotted on geraniums

Damaging populations of Western flower thrips were observed on geraniums this week. The presence of thrips was confirmed by visual observation of the plants, injury symptoms on the plants and adult thrips on yellow sticky cards used for monitoring pests. This detection illustrates the importance of…

US and Canadian scientists intent on battling murder hornets

Scientists in the US and Canada are exploring new ways to fight so-called murder hornets as the giant insects begin establishing nests this spring. Last Wednesday, scientists…

e-gro

Everything about lily basal rot

Easter lily popularity as a greenhouse crop has declined over the years, but there are still thousands of Easter lilies produced in greenhouses each spring. Easter lilies are not an easy crop, and a grower must be very regimented in their production approach so that they will be heavily budded or flowering by the ship date.…

Crop protection with a vacuum cleaner?

People need clean and healthy food and greenhouse-grown vegetables are a very good way of supplying them. This food then has to be protected against a variety of insects that damage either the fruits or the whole plants. Modern growers avoid the use of chemicals and rely on beneficial insects. Micothon…

University of California, Berkeley research

Ice-fighting bacteria could aid crops against frost damage

Every spring, California farmers have to be on the lookout for signs of frost. Faced with the prospect of losing an entire season’s harvest, growers spend millions of dollars…

Using intra eco shield to protect your crops

Intrahorti, a department of Intracare, is making way in the horticultural sector. In addition to Intra Hydro pure, which growers can use for cleaning and disinfection to guarantee the purest irrigation water, the company is taking a broader approach, for instance adding nutrients to her product range.…

Check out the HRI recording

Learn more on problems with and management options for redheaded flea beetles in nurseries

Recently, as part of their tHRIve series. the Horticultural Research Institute (HRI) organized a webinar about the Redheaded Flea Beetle. In the presentation, Bryan Kunkel of the University of Delaware explains more about the problems and how to manage it in nurseries. Topics discussedSo what topics have…

HortiPro

Improved signaling and monitoring of thrips with PheroThrip 2.0

The problems with various species of thrips have occupied the minds of many cultivations in recent years. Reason for HortiPro to invest in signaling and monitoring techniques…

Black root rot detected in university lab

Black root rot was detected in pansy this week in the UMass Extension Plant Diagnostic Lab. This disease is caused by the fungus Berkleyomyces basicola (formerly Thielaviopsis basicola). Production of dark fungal spores in and on plant roots results in the black lesions that give the disease its common…

Root-Pro, developed by Gadot Agro

Boosting plants' resilience with new formulation

Plants need a healthy environment in which to grow. Soil fungi can be harmful to plants, as they may restrict proper root development and nutrient uptake. Growers make great efforts to protect young plants against these pathogens. Gadot Agro from Israel has developed a new formulation called Root-Pro™, which…

CAN: New compliance measures for facilities moving gypsy moth host nursery stock

Who this affectsThis notice is of interest to Canadian facilities that intend to move nursery stock considered to be a host of the North American or European gypsy moth,…

New technology for optimized control of thrips and whitefly

Bioline Agrosciences is launching CART (Climate Adapted Release Technology) to further strengthen it’s commitment to growers and farmers and the environment. The technology has been applied to STARSKii, containing Amblyseiusswirskii, for optimized control of thrips and whitefly in multiple crops and…

Spotted lanternfly: what risks does it pose for growers

Lately, you might have heard a lot about a certain invasive pest in the news – the Spotted Lanternfly. This objectively beautiful but damaging species is a pest of certain trees, grape vines, and other horticultural crops. Spotted in North America as early as 2012, specimens of the invasive spotted…

Study ornamental plants adapted to urban ecosystem pollution: lawn grasses and painted daisy tolerating copper

Lawns and flower are major aesthetical and environmental elements of the urban ecosystem. However, harsh urban conditions such as pollution by heavy metals are unfavorable for plants. For example, copper is toxic for ornamental plants, limiting the spread of lawn grass and flowering plants. Therefore,…

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Study on impact of humidity and water availability on life of the predatory mite

The predatory mite Amblyseius swirskii is currently used as an efficient biological control agent of thrips, whiteflies and spider mites, which are economically damaging pests of ornamental plants and vegetable crops grown in greenhouses and fields worldwide. Currently, the effects of relative humidity…

A regeneration protocol of Calibrachoa var. Pampa Salmon INTA from apical meristems

Calibrachoa is an ornamental plant with high potential and commercial development, because its varieties stand out due the different shapes and colors of their flowers that make them attractive for use in pots and beds. Currently, the Floriculture Institute of the National Institute of Agricultural…

Australian March pest of the month: Edema ‘leaf spot’

Edema is not actually a pest or pathogen. It is a non-pathogenic, physiological disorder that is often mistaken for a leaf spot disease. It results when roots take up water faster than it can be used by the plant or transpired through the leaves. This results in the epidermal cells swelling and…

Ontario's resources on using natural enemies

Sarah Jandricic, OMAFRA, and Michael Short, Eco Habitat, hosted "IPM 101: Biocontrol Learning Series - The Basics of IPM in Floriculture" on March 2nd. They offered excellent information for growers and two of the many resources that they shared are very helpful for growers implementing biological…

Bacterial leaf spot diseases prevalent in wet greenhouses

Wet, humid, overcast conditions outside favors plant disease development inside greenhouses because plant foliage and soil remain wet for extended periods of time. Plant wetness and high humidity within warm greenhouses coupled with young, succulent seedlings and cuttings in production and poor…

Continuously monitoring thrips and whitefly

Whitefly and thrips are widespread major agricultural pests of various vegetable, ornamental and field-grown crops. Key species include the sweet potato whitefly Bemisia…

AU: New minor use permits for fungicide and pesticide available

Three Minor Use Permits have been approved by the Australian Pesticides and Veterinary Medicines Authority (APVMA) for the nursery industry. Through the newly contracted,…

Underground water systems; there's a lot we know (and a lot we don't)

Exceptional questions from growers, that is what Ines van Marrewijk of Groen Agro Control likes to focus on. If there is a solution to an issue that concerns a grower, Ines knows how to find it.At this moment, water quality is one of the major themes, she notes. The underground water system is a world on…

UK: Bayer issues light leaf spot warning to growers

Throughout late autumn and into 2021, there has been evidence of light leaf spot at relatively high levels on the leaf samples from susceptible varieties, after incubation. During January, varying levels of disease were reported using Bayer's SpotCheck service, with 68% of samples showing positive signs,…

Locusts threaten food security in high-value horti regions of Kenya

Thousands of farmers in Meru county are counting huge losses as desert locusts are ravaging their  farms daily. The locusts come at a time when most of the produce grown in eastern Kenya is ready to be harvested. These farmers are among hundreds of thousands from 14 other Kenyan counties who are affected by…

"Inspect incoming plants for pests and diseases"

Starting with high quality disease and insect free plant material is a critical step in the management of diseases and insect pests in the greenhouse. The first step in reducing pest pressure is to purchase high quality, pest free plant material from reputable producers. When new plant material is…

UK: Stricter movement of Xylella host species on the horizon

Xylella fastidiosa, commonly referred to as Xylella, is a bacterium that causes disease in a wide range of plants including many shrubs, herbaceous plants and several species…

Potato Virus Y infecting Calibrachoa hybrida for the first time in Argentina

Calibrachoa is a genus of the Solanaceae family endemic to South America that is used as an ornamental plant. Calibrachoa grows vigorously and has flowers of different colors such as pink, violet, red, yellow, and salmon. Even though Calibrachoa hybrida in Argentina is mainly sold in the local markets…

Jürgen Brokelman, HortiPro

Getting rid of moths with delta traps

HortiPro develops natural and biological agents as an alternative to chemical agents. In the case of the Duponchelia fovealis moth, which is typically fumigated, a test was done with gerbera delta traps in combination with special Duponchelia pheromones. The result was a clear reduction in the number of…

Asperello® T34 Biocontrol™  granted label expansion

"Label expansion means more US crops to benefit"

The biofungicide Asperello® T34 Biocontrol™ has been granted label expansion in the US to cover an array of field-grown and protected crops. “Growers from across the US had…

UK: New legislation to address the plant health threat posed by Xylella

The Government has  announced plans to address the plant health threat posed by Xylella, a key step for setting plant health legislation tailored to risks in Great Britain. A new…

Tuesday, March 2, 2021 10am – 3pm EST

Greenhouse IPM 101 workshop moving to Zoom

As we are still mid-pandemic, Eco Habitat’s annual hands-on IPM Workshop will look a bit different this year!. Still a go-to resource for learning IPM basics, with the help of OMAFRA staff, it’s moving to Zoom.  Keep reading for the topics they will be covering, and how to register. Who it’s for:Do you have new…

Young aster shoots grow easily under ReduFuse IR

Asters emerge again after the harvest. The new shoots are fragile and must therefore be protected. Kwekerij Zijdezicht has chosen ReduFuse IR as the best coating.  Kwekerij Zijdezicht with three locations in De Lier and 's-Gravenzande combines the cultivation of asters with chrysanthemums. “This fits well…

Downing Street will not publish Brexit deal impact assessment

Downing Street has refused to publish an impact assessment on its Brexit deal with the EU. The prime minister's spokesperson dismissed calls to publish the analysis, saying it…

Stevia: managing EC to prevent foliar damage

Stevia (Stevia rebaudiana) has gained popularity as an alternative sweetener due to high glycosides concentrations. In warmer climates (USDA zones 9-11), it is a perennial herb, but it will not overwinter in colder climates, however it is treated like an annual. Greenhouse growers have been producing…

Teun Valstar, Shadowplant:

"No longer throwing plants away thanks to maximum biological use"

Where two years ago one to two per cent of the Calatheas were unsaleable due to spider mite and thrips, virtually no plants now go into the container. "You could say that we’ve solved a problem by switching over to maximum biological use," explains Teun Valstar of Shadowplant of the revolution. The…

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Study on impact of humidity and water availability on life history of predatory mite

The predatory mite Amblyseius swirskii (Athias-Henriot) (Acari: Phytoseiidae) is currently used as an efficient biological control agent of thrips, whiteflies and spider mites, which are economically damaging pests of ornamental plants and vegetable crops grown in greenhouses and fields worldwide.…

e-GRO Alert

Aphids in unexpected places

Although the walls of a greenhouse will protect your crops to a multitude of insects, aphids tend to pop up in unexpected places. Recognizing the aphid species present can be important for determining the correct biocontrols to use, to help understand why biocontrols released aren’t working well, and to detect the presence of a…

Study on leaf spots of calibrachoa caused by Nigrospora oryzae

Calibrachoa hybrida (calibrachoa, million bells) is a flowering ornamental with increasing importance due to the existence of many successful cultivars for growing indoors in containers and planting in the garden and landscape. The outstanding characteristic is a profuse flowering and intense colour. In…

e-GRO Alert

Calonectria root, crown and cutting rots: less common but just as damaging

Spathiphyllum plants within a greenhouse showed symptoms of wilting and yellowing of the oldest leaves. These are classic symptoms of a root disease. Roots of young plants also showed dark discoloration mostly at the root tips. Serology tests for Phytophthora were negative and microscopic examination of…

e-Gro Alert

Powdery mildew on succulents is not what you would expect

Powdery mildew on succulents can appear more like sun scald or edema. In this alert, e-Gro Alert will show you what to look for and the fungicides labeled to treat powdery mildew.  From 1998 to 2019, cacti and succulent production for containers, crafts, and floral arrangements has increased by over 75% ($78.6…


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